import numpy as np
x = np.array([1.0, 2.0, 3.0])
print(x)
print(type(x))
x = np.array([1.0, 2.0, 3.0])
y = np.array([2.0, 4.0, 6.0])
print(x + y)  # 对应元素的加法
print(x - y)
print(x * y)  # element-wise product
print(x / y)